barton



May 26, 1931 F. M. BARTON 1,806,662

E T F c STRUCTURES Original Filed Jan. 7, 1928 2 Sheets-Sheet 1 .N jy FM juz@ May 26, 1931. F. M. BARTON METALLIC INSERT FOR CONCRETE STRUTURES Original Filed Jan. 7. 1928 www mv 2 Sheets-Sheet 2 Patented May 26, 1931 UNITED STATES FRANCIS M. BARTON, OF CHICAGO, ILLINOI SCOTT-WEISS STEEL COMPANY, OF CHICAGO,

S, ASSIGNOR, BY ASSIGNMENTS'TO ILLINOIS, A CORPORATION OF ILLINOIS METALLIC INSERT FOR CONCRETE STRUCTURES Application ined-January 7, 1928, Serial No. 245,084. Renewed April 8, 1981.

The invention relates to metallic inserts for concrete structures.

One object of the invention is to provide an improved insert for use in securing elements to a concrete structure.

Another object of the invention is to provide an improved insert which serves conjointly for the attachment of elements to a concrete structure and has a screed. u

A still further object of the invention is to provide an improved metallic insert adapted to receive nails for securing elements to the concrete structure which is provided with means for clinching nails in the structure as the are driven into place.

ther objects of the invention will appear from the description.

The invention consists in the several novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a sectional p erspective illustrating the invention applied to a concretefloor. Fig. 2 is a section talren longitudinally through one of the nailing strips. Fig. 3 is a section taken transversely of the nailing strips. Fig. 4 is a d etail perspective of' one of the inserts. F1g. 5 'is a horizontal section through one of the inserts. Fig. 6 is a similar section taken at the oint between the ends of aligned inserts. .Fig 7 is a perspective of one of the connecting devices between the inserts.

rThe improved insert is exemplified as used in a concrete floor' for the attachment of nailing strips or sleepers b on which the floor boards c are laid and secured. Y

The improved insert D is formed of a single piece or' sheet metal bent to form a loop (Z at its lower end, side walls. d and d2 eX- tending upwardly from the loop d, and flanges d3, d* extending laterally from the upper ends of the walls d', d2 respectively. The walls d', d2 are corrugated to form a series of nail guides or sockets d5, the corrugations being complementary to formI ways or guides for nails e. The inner crowns de of the corrugations in the walls d, d2 abut a ainst each other so that the outer portions o? the corrugations will be spaced apart to receive the nails and to prevent the conc'rete from collapsing the Walls. The upper portions of these corrugations are substantially transverse to.the surface of the concrete structure, and their inner portions are oblique, as at al", to bend or deflect the portion of the nail adjacent its point obliquely as at e. The point of the nail is usually of sufficient length, as indicated at e2, to be deflected transversely into the loop portion d. As a result, a nail driven into one of the sockets d5 of the insert will be bent or clinched by the inclined portion Z7 of the corrugations, and the point will also be bent into the groove d8 formed below the inner ends of the inclined portion 7 of the corrugations, so that the nail will be securely held against withdrawal after it has'once been driven into the insert. The -flanges d3 are held in the plane of' the face 'of the concrete structure, so that the insert serves as a screed as `well as an insert for securing elements to the concrete structure. Where the corrugations join-the flanges da, they are bevelled, as at d", to direct nails into the recesses or sockets d5.

In the exemplification of the invention illustrated in Figs. 1 to 3, the insert is supported in the form for the concrete, by any desired number of supports F. Each of said supports is preferably formed of sheet metal bent into U-shape and provided with prongs f adapted to be driven into apart a of the concrete form. At its upper end, the support F is provided with a notch f to receive the loop d8 and walls d', d2 of the insert, so the sides of the support will straddle they insert and secure it vertically and transversely. By thus supporting the insert with its flanges cl3 in the plane of the surface of the concrete floor a, it serves as a guide in pouring the concrete to the desired level. After the concrete floor has been laid, the nailing strips or sleepers b are laid on the floor and secured thereto by nails e driven through the strips and into the sockets d5 of the inserts. The wood floor o is then laid and secured on strips b, as well understood in the art. In practice, it is desirable to form the inserts of such length that they can be conveniently handled and vsitely extending arms or members g fitting into the ends of the grooves d8 of the loop portions d of the inserts, and tongues g2 adapted to fit against the outer faces of the walls d', d2 of the contiguous inserts. The clips G are thus insertable into the ends of the inserts, and when the latter are moved together, the clip will form an interlock between them. When the concrete has been poured around the inserts and the clip, they will be permanently and securely interlocked to form a substanl tially continuous insert composed of convenient lengths. f

The invention exemplifies an insert for concrete, which is formed of sheet metal, is adapted to securely retain ends of nails driven into them to secure members to the concrete,

l is adapted to serve as a screed in laying the concrete, which may be .made in convenient len hs and assembled to form a long substantial y continuous insert for receiving nails, and which can be produced at a low cost.

While the invention has been illustrated and described in connection with a concrete floor, it is to be understood that it is unable in any concrete structure, such as a joist or a stud, to receive nails for securing lath or other element, as well as nailing strips or sleepers.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, whal I claim as new and desire to secure by Letters Patent, is: 1. An insert for concrete structures forme of sheet metal and comprising a pair of oppositely facin side walls complementally corrugated to orm sockets for attaching devices, the crown portions of the sides between the sockets being arranged in abutting relaattaching devices, the inner ortions of the sockets being angled to ben the attaching devices, the crown parts of the sides adjacent the angled ortions of the sockets being arranged in a utting relation.

4. An insert for concrete structures formed of sheet metal and comprising a pair of oppositelg facing corrugated side walls, said walls eing arranged so that their inner crowns are in abutting relation and their outer crowns form sockets for attaching 'devices, the inner ends of the walls being connected by an integral longitudinally extending loop forming a transverse groove in communication with the sockets and adapted to receive the inner ends of the attaching devices.

5. An insert for concrete structures formed of sheet metal and comprising a pair of oppositely facing corrugated side walls ar- 4ranged so that their inner crowns abut and their outer crowns form sockets for attaching devices, the inner ends of the sockets being oblique to bend the attaching devices the inner ends of the walls being connected by an integral longtiudinally extending loop forming a transverse groove in communication with the sockets and adapted to receive the inner ends of the attaching devices.

6. The combination with a plurality of longitudinally aligned inserts, each comprisin a pair of oppositely facing side walls shaped to form a plurality of sockets for receiving attaching devices, and cli s adapted to interit with the side walls a jacent the ends of 100 the inserts to secure said inserts in connected relation.

7. The combination with a plurality of inserts, each formed of sheet metal and comprising corrugated side walls forming sock- 105 -ets for attaching devices, and connected at the inner ends by an integral groove-forming and-'clips to secure the inserts in connectedfrelatiom having arms to enter the l groovesdadia'cent the ends of the loops and 110 tonlgues to `engage the outer faces of the side wa s.

Signed at Chicago Illinois this 28th da of July, 1927: y FRANCIS M. BARTON. 

